CN114137693A - Optical imaging lens - Google Patents

Optical imaging lens Download PDF

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Publication number
CN114137693A
CN114137693A CN202111409516.8A CN202111409516A CN114137693A CN 114137693 A CN114137693 A CN 114137693A CN 202111409516 A CN202111409516 A CN 202111409516A CN 114137693 A CN114137693 A CN 114137693A
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Prior art keywords
lens
optical imaging
imaging lens
optical
image
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CN202111409516.8A
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CN114137693B (en
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吕赛锋
戴付建
赵烈烽
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Zhejiang Sunny Optics Co Ltd
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Zhejiang Sunny Optics Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/64—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having more than six components
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

The application discloses an optical imaging lens, this optical imaging lens includes along the optical axis from the object side to the image side in proper order: a first lens having a positive optical power; a second lens having a focal power, wherein the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; a third lens having optical power; a fourth lens having an optical power; a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is concave and the image-side surface of the fifth lens element is convex; a sixth lens having a negative optical power; a seventh lens having positive optical power; and an eighth lens having a negative optical power; the total effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens meet the following requirements: f × TAN (FOV/2) >4.0 mm.

Description

Optical imaging lens
Divisional application
The application is a divisional application of a Chinese invention patent application with the invention name of 'optical imaging lens' filed on 2019, 10 and 9 and the application number of 201910953640.7.
Technical Field
The present disclosure relates to an optical imaging lens, and more particularly, to an optical imaging lens including eight lenses.
Background
In recent years, with rapid development of portable electronic products such as smartphones and tablet computers, demands for imaging lenses mounted on portable electronic devices have been increasing. On the one hand, portable electronic products are increasingly being miniaturized and made thinner. On the other hand, imaging lenses mounted on portable electronic devices are required to have high imaging quality. This requires that the optical imaging lens used in combination meet the requirements of miniaturization and high imaging quality.
Disclosure of Invention
The present application provides an optical imaging lens applicable to portable electronic products that may solve, at least, or in part, at least one of the above-mentioned disadvantages of the related art.
An aspect of the present application provides an optical imaging lens, in order from an object side to an image side along an optical axis, comprising: a first lens having a positive optical power; a second lens having a focal power, wherein the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave; a third lens having optical power; a fourth lens having an optical power; a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is concave and the image-side surface of the fifth lens element is convex; a sixth lens having a negative optical power; a seventh lens having positive optical power; and an eighth lens having a negative optical power. The total effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens meet the following conditions: f × TAN (FOV/2) >4.0 mm.
In one embodiment, the total effective focal length f of the optical imaging lens and the combined focal length f34 of the third lens and the fourth lens satisfy: f/f34 is more than 0 and less than or equal to 0.6.
In one embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R13 of the object side surface of the seventh lens satisfy: f/R13> 2.5.
In one embodiment, the second lens and the third lens are separated by a distance T23 on the optical axis and a center thickness CT2 of the second lens on the optical axis that satisfies: 2.0< T23/CT2< 3.5.
In one embodiment, the distance T45 separating the fourth lens and the fifth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis satisfy: 1.5< T45/CT5< 2.5.
In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens satisfy: 1.5< f/f7< 2.0.
In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy: f5/f6 is more than or equal to 0.8 and less than 2.0.
In one embodiment, the total effective focal length f of the optical imaging lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy: f/R3+ f/R4> 4.5.
In one embodiment, the total effective focal length f of the optical imaging lens, the radius of curvature R9 of the object-side surface of the fifth lens, and the radius of curvature R10 of the image-side surface of the fifth lens satisfy: f/R9+ f/R10< -7.0.
In one embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f1 of the first lens satisfy: f/f1 is more than or equal to 0.9 and less than or equal to 1.1.
In one embodiment, a total effective focal length f of the optical imaging lens and a combined focal length f67 of the sixth lens and the seventh lens satisfy: f/f67 is more than or equal to 1.0 and less than or equal to 1.5.
In one embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens satisfy: f/EPD < 1.45.
In one embodiment, the effective focal length f2 of the second lens and the effective focal length f8 of the eighth lens satisfy: 2< f2/f8< 3.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens satisfy: -0.5< R1/R2< 0.
In one embodiment, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis satisfy: more than or equal to 1 (CT3+ CT4)/(CT6+ CT7) < 1.2.
In one embodiment, the distance T78 separating the seventh lens and the eighth lens on the optical axis and the central thickness CT8 of the eighth lens on the optical axis satisfy: 1.2< T78/CT8< 1.8.
In one embodiment, a distance TTL between an object side surface of the first lens element and an imaging surface of the optical imaging lens on the optical axis and an entrance pupil diameter EPD of the optical imaging lens satisfy: TTL/EPD is less than or equal to 2.0.
In one embodiment, the abbe number V7 of the seventh lens and the abbe number V6 of the sixth lens satisfy: V7-V6 is more than or equal to 0 and less than 15.
The optical imaging lens provided by the application comprises a plurality of lenses, such as a first lens to an eighth lens. The proportion relation between the total effective focal length of the optical imaging lens and the combined focal length of the third lens and the fourth lens is reasonably set, the focal power and the surface type of each lens are optimized, and the optical imaging lens is reasonably matched with each other, so that the imaging quality of the optical imaging lens is improved while the optical imaging lens is miniaturized and light and thin.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 shows a schematic structural view of an optical imaging lens according to embodiment 1 of the present application;
fig. 2A to 2D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 1;
fig. 3 is a schematic structural view showing an optical imaging lens according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 2;
fig. 5 is a schematic structural view showing an optical imaging lens according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatic curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 3;
fig. 7 is a schematic structural view showing an optical imaging lens according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 4;
fig. 9 is a schematic structural view showing an optical imaging lens according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 5;
fig. 11 is a schematic structural view showing an optical imaging lens according to embodiment 6 of the present application;
fig. 12A to 12D show an axial chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the optical imaging lens of embodiment 6.
Detailed Description
For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The features, principles, and other aspects of the present application are described in detail below.
An optical imaging lens according to an exemplary embodiment of the present application may include eight lenses having optical powers, i.e., a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The eight lenses are arranged in order from an object side to an image side along an optical axis. Each adjacent lens may have an air space therebetween.
In an exemplary embodiment, the first lens may have a positive optical power; the second lens can have negative focal power, and the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has negative focal power; the fourth lens has positive focal power; the fifth lens has negative focal power, the object side surface of the fifth lens is a concave surface, and the image side surface of the fifth lens is a convex surface; the sixth lens has negative focal power; the seventh lens may have a positive optical power; and the eighth lens may have a negative optical power. The focal power and the surface type of each lens in the optical system are reasonably matched, so that the aberration of the optical system can be effectively balanced, and the imaging quality is improved.
In an exemplary embodiment, both the object-side surface and the image-side surface of the first lens may be convex.
In an exemplary embodiment, the image side surface of the third lens may be concave.
In an exemplary embodiment, both the object-side surface and the image-side surface of the fourth lens may be convex.
In an exemplary embodiment, the object-side surface of the sixth lens element may be convex, and the image-side surface may be concave.
In an exemplary embodiment, the object side surface of the seventh lens may be convex.
In an exemplary embodiment, both the object-side surface and the image-side surface of the eighth lens may be concave.
In an exemplary embodiment, a total effective focal length f of the optical imaging lens and a combined focal length f34 of the third lens and the fourth lens may satisfy: 0< f/f34 ≦ 0.6, for example, 0.4< f/f34 ≦ 0.6. The combined focal length of the third lens and the fourth lens is reasonably distributed, so that the light deflection is favorably slowed down, the sensitivity is reduced, the total length of the optical imaging lens is favorably shortened, and the miniaturization of the lens is realized.
In an exemplary embodiment, the total effective focal length f of the optical imaging lens and the radius of curvature R13 of the object side surface of the seventh lens may satisfy: f/R13>2.5, e.g., 2.5< f/R13< 3.5. The proportional relation between the total effective focal length of the optical imaging lens and the curvature radius of the object side surface of the seventh lens is reasonably set, so that the clear aperture of the optical system is increased, the light deflection angle and the system sensitivity in a large aperture state are reduced, and the imaging quality of the optical imaging lens in a close-range state is improved.
In an exemplary embodiment, the distance T23 separating the second and third lenses on the optical axis and the central thickness CT2 of the second lens on the optical axis may satisfy: 2.0< T23/CT2< 3.5. The second lens and the third lens are reasonably arranged, the distance between the second lens and the third lens on the optical axis is in proportion to the central thickness of the second lens on the optical axis, and the processing feasibility of the second lens is favorably ensured.
In an exemplary embodiment, the distance T45 separating the fourth lens and the fifth lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis may satisfy: 1.5< T45/CT5< 2.5. Set up the fourth lens with the fifth lens is in spacing distance on the optical axis and fifth lens are in the ratio of the central thickness on the optical axis is in reasonable numerical range, has both been favorable to realizing the camera lens miniaturization, is favorable to avoiding the reflection of light between two lens surfaces again.
In an exemplary embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens may satisfy: 1.5< f/f7< 2.0. The proportion relation between the total effective focal length of the optical imaging lens and the effective focal length of the seventh lens is reasonably set, so that the imaging quality of the large-aperture optical system in a close-range state is improved, and a good shooting effect is obtained.
In an exemplary embodiment, the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens may satisfy: f5/f6 is more than or equal to 0.8 and less than 2.0. The focal power of the fifth lens and the focal power of the sixth lens are reasonably distributed, so that chromatic aberration of the system can be eliminated, the secondary spectrum of the optical system can be reduced, and the imaging quality of the system can be improved.
In an exemplary embodiment, the total effective focal length f of the optical imaging lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens may satisfy: f/R3+ f/R4>4.5, e.g., 5.5< f/R3+ f/R4< 6.0. The total effective focal length of the optical imaging lens, the curvature radius of the object side surface of the second lens and the mutual relation of the curvature radius of the image side surface of the second lens are reasonably set, so that the deflection of light rays is favorably slowed down, the integral sensitivity of the system is reduced, and the imaging quality of the optical system is improved. Especially in a large aperture system, the above effect is more obvious when the incident angle and the emergent angle of the light rays under the diaphragm are too large.
In an exemplary embodiment, the total effective focal length f of the optical imaging lens, the radius of curvature R9 of the object-side surface of the fifth lens, and the radius of curvature R10 of the image-side surface of the fifth lens may satisfy: f/R9+ f/R10< -7.0, for example, -9.0< f/R9+ f/R10< -7.0. The total effective focal length of the optical imaging lens, the curvature radius of the object side surface of the fifth lens and the mutual relation between the curvature radii of the image side surfaces of the fifth lens are reasonably set, the curvature radii between the object side surface and the image side surfaces of the fifth lens are effectively distributed, the optical system aberration convergence is facilitated, and the imaging quality is improved.
In an exemplary embodiment, the total effective focal length f of the optical imaging lens and the effective focal length f1 of the first lens may satisfy: f/f1 is more than or equal to 0.9 and less than or equal to 1.1. The proportional relation between the total effective focal length of the optical imaging lens and the effective focal length of the first lens is reasonably set, the focal power of the first lens is effectively distributed, and the reduction of the sensitivity of the central area field of the optical system is facilitated.
In an exemplary embodiment, a total effective focal length f of the optical imaging lens and a combined focal length f67 of the sixth lens and the seventh lens may satisfy: f/f67 is more than or equal to 1.0 and less than or equal to 1.5. The proportional relation between the total effective focal length of the optical imaging lens and the combined focal length of the sixth lens and the seventh lens is reasonably set, the edge field image height of the optical system is favorably improved, and the characteristics of high pixels and large image planes of the optical system are realized.
In an exemplary embodiment, the total effective focal length f of the optical imaging lens and the entrance pupil diameter EPD of the optical imaging lens may satisfy: f/EPD <1.45, e.g., 1.35< f/EPD < 1.45. The proportional relation between the total effective focal length of the optical imaging lens and the entrance pupil diameter of the optical imaging lens is reasonably set, so that the light flux of the optical system is increased, and the shooting effect of the optical system in a dark environment is improved.
In an exemplary embodiment, the effective focal length f2 of the second lens and the effective focal length f8 of the eighth lens may satisfy: 2< f2/f8< 3. The proportional relation between the effective focal length of the second lens and the effective focal length of the eighth lens is reasonably set, so that the sensitivity of the central area view field of the optical system is favorably reduced, and the imaging quality of a local area in the central area view field is prevented from being reduced.
In an exemplary embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R2 of the image-side surface of the first lens may satisfy: -0.5< R1/R2<0, e.g., -0.2< R1/R2< 0. The proportional relation between the curvature radius of the object side surface of the first lens and the curvature radius of the image side surface of the first lens is reasonably set, so that ghost images formed by reflection of light rays in an optical system are reduced, the spherical aberration of the system is improved, and the field sensitivity of a central area is reduced.
In an exemplary embodiment, a center thickness CT3 of the third lens on the optical axis, a center thickness CT4 of the fourth lens on the optical axis, a center thickness CT6 of the sixth lens on the optical axis, and a center thickness CT7 of the seventh lens on the optical axis may satisfy: more than or equal to 1 (CT3+ CT4)/(CT6+ CT7) < 1.2. The central thickness of the four lenses is reasonably distributed, so that the forming characteristic of the lenses is ensured, the deflection degree of light rays in the system is reduced, the sensitivity of the system is reduced, the whole length of the optical system is shortened, and the miniaturization of the lens is realized.
In an exemplary embodiment, a separation distance T78 of the seventh lens and the eighth lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis satisfy: 1.2< T78/CT8< 1.8. The seventh lens and the eighth lens are reasonably arranged, the proportional relation between the spacing distance on the optical axis and the center thickness of the eighth lens on the optical axis is favorably improved, the imaging quality of the optical system in a close-range state is favorably improved, the optical system can give consideration to close-range imaging and long-range imaging, and better imaging quality is obtained.
In an exemplary embodiment, a distance TTL between an object side surface of the first lens and an imaging surface of the optical imaging lens on the optical axis and an entrance pupil diameter EPD of the optical imaging lens may satisfy: TTL/EPD is less than or equal to 2.0, for example, 1.8< TTL/EPD is less than or equal to 2.0. The object side face of the first lens is reasonably arranged to the imaging surface of the optical imaging lens is in the proportional relation between the distance on the optical axis and the entrance pupil diameter of the optical imaging lens, so that the light transmission amount of the optical system is increased, the shooting effect of the optical system in a dark environment is improved, and the miniaturization of the lens is realized.
In an exemplary embodiment, the total effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens may satisfy: f × TAN (FOV/2) >4.0mm, for example, 4.0mm < f × TAN (FOV/2) <4.5 mm. The mutual relation between the total effective focal length of the optical imaging lens and the maximum field angle of the optical imaging lens is reasonably set, so that the characteristics of high pixel and large image surface of the optical imaging lens are favorably realized, the shooting effect is improved, and the imaging quality is improved.
In an exemplary embodiment, the abbe number V7 of the seventh lens and the abbe number V6 of the sixth lens may satisfy: V7-V6 is more than or equal to 0 and less than 15. And the mutual relation between the Abbe number of the seventh lens and the Abbe number of the sixth lens is reasonably set, so that the integral aberration of the convergent optical system is favorably converged, and the imaging quality of the convergent optical system is improved.
In an exemplary embodiment, the optical imaging lens may further include a diaphragm. The diaphragm may be disposed at an appropriate position as required. For example, a diaphragm may be disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element on the imaging surface.
The optical imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, the above eight lenses. The optical imaging lens meets the requirements of large aperture, large image plane, high pixel, portability and the like, has excellent imaging quality in both long-range view and close-range view, and can obtain satisfactory imaging effect in different environments.
In an exemplary embodiment, at least one of the mirror surfaces of each lens is an aspheric mirror surface, i.e., at least one of the object side surface of the first lens to the image side surface of the eighth lens is an aspheric mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens is an aspherical mirror surface. Optionally, each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens has an object-side surface and an image-side surface which are aspheric mirror surfaces.
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the optical imaging lens described above.
Exemplary embodiments of the present application also provide an electronic apparatus including the above-described imaging device.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an optical imaging lens may be varied to achieve the various results and advantages described in the present specification without departing from the claimed subject matter. For example, although eight lenses are exemplified in the embodiment, the optical imaging lens is not limited to include eight lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of an optical imaging lens applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 is a schematic view showing a structure of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image forming surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
Table 1 shows a basic parameter table of the optical imaging lens of embodiment 1, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
Figure BDA0003364688780000061
Figure BDA0003364688780000071
TABLE 1
In the present embodiment, the total effective focal length f of the optical imaging lens is 5.19mm, and the maximum field angle FOV of the optical imaging lens is 80.5 °.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
Figure BDA0003364688780000072
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1 to S16 used in example 14、A6、A8、A10、A12、A14、A16、A18And A20。
Figure BDA0003364688780000073
Figure BDA0003364688780000081
TABLE 2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the optical imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 1, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens according to embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. Fig. 3 shows a schematic structural diagram of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image forming surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f of the optical imaging lens is 5.21mm, and the maximum field angle FOV of the optical imaging lens is 80.3 °.
Table 3 shows a basic parameter table of the optical imaging lens of embodiment 2, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
Figure BDA0003364688780000082
Figure BDA0003364688780000091
TABLE 3
In embodiment 2, both the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 are aspheric. Table 4 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S16 used in example 24、A6、A8、A10、A12、A14、A16、A18And A20。
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.9278E-03 5.2486E-04 -1.7472E-03 1.8825E-03 -8.9180E-04 2.2385E-04 -3.0370E-05 3.2276E-06 -3.7451E-07
S2 3.4438E-02 -2.2753E-02 1.3937E-02 -6.3392E-03 1.8929E-03 -3.2380E-04 2.2663E-05 0.0000E+00 0.0000E+00
S3 -6.7857E-02 4.3287E-02 -5.0430E-02 4.4144E-02 -2.6813E-02 1.0233E-02 -2.1946E-03 2.0129E-04 0.0000E+00
S4 -1.1837E-01 7.6089E-02 -8.7068E-02 7.7847E-02 -5.5062E-02 2.7867E-02 -9.6609E-03 2.0661E-03 -2.1134E-04
S5 -2.4388E-02 2.6363E-02 -5.4081E-02 7.7842E-02 -8.0925E-02 5.6147E-02 -2.4504E-02 6.0342E-03 -6.3511E-04
S6 -1.0398E-01 9.0490E-02 -1.3325E-01 1.5706E-01 -1.3190E-01 7.3841E-02 -2.6045E-02 5.2256E-03 -4.5248E-04
S7 -9.9758E-02 6.5993E-02 -9.9443E-02 1.1133E-01 -8.6912E-02 4.4709E-02 -1.4434E-02 2.6474E-03 -2.0824E-04
S8 -2.4630E-02 -1.3615E-02 1.3556E-02 -1.5090E-02 1.1661E-02 -5.8922E-03 1.8366E-03 -3.1740E-04 2.3182E-05
S9 2.0726E-01 -1.8094E-01 1.4302E-01 -8.3625E-02 3.4053E-02 -9.1501E-03 1.5426E-03 -1.4799E-04 6.1574E-06
S10 1.5632E-01 -1.3888E-01 1.0934E-01 -6.3314E-02 2.5690E-02 -6.9436E-03 1.1795E-03 -1.1295E-04 4.6170E-06
S11 -1.9841E-02 -6.2588E-03 7.6698E-03 -4.2781E-03 1.1255E-03 -1.2489E-04 -8.9136E-07 1.2934E-06 -7.4310E-08
S12 -1.6058E-01 4.6220E-02 -8.5781E-03 4.1305E-04 6.7485E-05 2.4127E-05 -1.0125E-05 1.1457E-06 -4.3550E-08
S13 -1.0458E-01 3.1234E-02 -6.2996E-03 -2.6175E-03 1.6276E-03 -3.4856E-04 3.7746E-05 -2.0828E-06 4.6679E-08
S14 6.9424E-02 -2.5171E-02 4.0577E-03 -1.5266E-03 6.5359E-04 -1.4183E-04 1.5987E-05 -9.1684E-07 2.1305E-08
S15 -2.0062E-02 -7.3659E-04 5.4851E-03 -1.6718E-03 2.4506E-04 -2.0751E-05 1.0405E-06 -2.8831E-08 3.4124E-10
S16 -3.3934E-02 8.5660E-03 -1.4367E-03 1.4002E-04 -6.5150E-06 -4.6619E-08 2.1480E-08 -9.8083E-10 1.5025E-11
TABLE 4
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens according to embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic structural diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image forming surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a concave image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f of the optical imaging lens is 5.42mm, and the maximum field angle FOV of the optical imaging lens is 78.1 °.
Table 5 shows a basic parameter table of the optical imaging lens of embodiment 3, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
Figure BDA0003364688780000101
TABLE 5
In embodiment 3, both the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 are aspheric. Table 6 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S16 used in example 34、A6、A8、A10、A12、A14、A16、A18And A20。
Figure BDA0003364688780000102
Figure BDA0003364688780000111
TABLE 6
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens according to embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic structural diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image forming surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f of the optical imaging lens is 5.37mm, and the maximum field angle FOV of the optical imaging lens is 78.6 °.
Table 7 shows a basic parameter table of the optical imaging lens of embodiment 4, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
Figure BDA0003364688780000112
Figure BDA0003364688780000121
TABLE 7
In embodiment 4, both the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 are aspheric. Table 8 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S16 used in example 44、A6、A8、A10、A12、A14、A16、A18And A20。
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.5743E-03 6.3667E-05 -1.0265E-03 1.0763E-03 -4.6031E-04 1.0346E-04 -1.2613E-05 1.2601E-06 -1.3550E-07
S2 2.7067E-02 -1.6333E-02 9.3379E-03 -3.9735E-03 1.1095E-03 -1.7789E-04 1.1888E-05 0.0000E+00 0.0000E+00
S3 -6.4651E-02 3.0389E-02 -3.0090E-02 2.3806E-02 -1.3548E-02 4.9057E-03 -1.0026E-03 8.7779E-05 0.0000E+00
S4 -1.0621E-01 5.3047E-02 -5.1687E-02 3.9829E-02 -2.5506E-02 1.2069E-02 -4.0051E-03 8.2562E-04 -8.1559E-05
S5 -1.8351E-02 1.3685E-02 -3.9771E-02 6.1537E-02 -6.2413E-02 3.9842E-02 -1.5536E-02 3.3777E-03 -3.1397E-04
S6 -8.0243E-02 2.9239E-02 -6.0891E-02 8.8060E-02 -7.5135E-02 3.9491E-02 -1.2608E-02 2.2374E-03 -1.6878E-04
S7 -7.8256E-02 3.0755E-02 -9.3437E-02 1.3230E-01 -1.0775E-01 5.4737E-02 -1.7022E-02 2.9368E-03 -2.1306E-04
S8 -1.0313E-02 -7.1833E-03 -2.4278E-02 2.8163E-02 -1.4292E-02 3.6020E-03 -3.3502E-04 -2.7031E-05 5.7017E-06
S9 2.4341E-01 -2.1788E-01 1.3181E-01 -4.1105E-02 1.2182E-03 3.7472E-03 -1.2943E-03 1.8503E-04 -1.0142E-05
S10 2.0360E-01 -1.8785E-01 1.1739E-01 -4.6232E-02 1.1224E-02 -1.4481E-03 3.3666E-05 1.3991E-05 -1.2349E-06
S11 -3.3541E-02 3.8486E-02 -3.7064E-02 2.0620E-02 -7.6914E-03 1.9038E-03 -2.9639E-04 2.6121E-05 -9.8698E-07
S12 -3.1677E-01 2.5815E-01 -1.5543E-01 6.2656E-02 -1.6914E-02 3.0037E-03 -3.3361E-04 2.0866E-05 -5.5921E-07
S13 -1.3380E-01 9.7729E-02 -7.4212E-02 3.0068E-02 -7.0833E-03 1.0216E-03 -8.9105E-05 4.3179E-06 -8.9257E-08
S14 1.8239E-01 -1.3095E-01 3.9544E-02 -6.4649E-03 6.4514E-04 -4.9121E-05 3.6925E-06 -2.2007E-07 5.9924E-09
S15 -2.2843E-02 -3.4780E-02 2.4815E-02 -6.8028E-03 1.0377E-03 -9.6634E-05 5.5054E-06 -1.7718E-07 2.4709E-09
S16 -5.7651E-02 -3.3443E-03 8.0060E-03 -2.5958E-03 4.3024E-04 -4.1745E-05 2.3907E-06 -7.4896E-08 9.8991E-10
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens according to embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic structural diagram of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image forming surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f of the optical imaging lens is 5.24mm, and the maximum field angle FOV of the optical imaging lens is 79.9 °.
Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
Figure BDA0003364688780000131
TABLE 9
In embodiment 5, both the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 are aspheric. Table 10 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S16 used in example 54、A6、A8、A10、A12、A14、A16、A18And A20。
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.6659E-03 7.1983E-04 -2.0823E-03 1.9700E-03 -8.6628E-04 2.0098E-04 -2.4440E-05 2.2932E-06 -2.7826E-07
S2 3.0859E-02 -2.1200E-02 1.3422E-02 -6.1452E-03 1.7976E-03 -2.9640E-04 1.9840E-05 0.0000E+00 0.0000E+00
S3 -6.3652E-02 3.4438E-02 -4.0374E-02 3.6579E-02 -2.2644E-02 8.6413E-03 -1.8321E-03 1.6510E-04 0.0000E+00
S4 -1.0883E-01 6.2702E-02 -6.8921E-02 5.7779E-02 -3.6272E-02 1.5185E-02 -4.1288E-03 6.8897E-04 -6.1588E-05
S5 -2.2645E-02 1.8457E-02 -4.2558E-02 6.1298E-02 -6.2370E-02 4.1568E-02 -1.7280E-02 4.0404E-03 -4.0523E-04
S6 -8.8836E-02 4.7445E-02 -6.6569E-02 7.7913E-02 -6.3764E-02 3.4195E-02 -1.1370E-02 2.1147E-03 -1.6729E-04
S7 -8.8534E-02 4.4676E-02 -8.4597E-02 1.0811E-01 -8.9222E-02 4.6997E-02 -1.5124E-02 2.6885E-03 -2.0044E-04
S8 -2.1248E-02 -8.4977E-03 -9.6738E-03 1.4157E-02 -7.6584E-03 1.8003E-03 -4.8181E-05 -5.2399E-05 6.6984E-06
S9 2.4319E-01 -2.3891E-01 1.7944E-01 -8.6549E-02 2.5476E-02 -4.1234E-03 2.5703E-04 1.3636E-05 -1.9870E-06
S10 2.0007E-01 -2.1021E-01 1.6700E-01 -9.0005E-02 3.2752E-02 -7.9007E-03 1.2115E-03 -1.0659E-04 4.0728E-06
S11 -1.3459E-02 -9.6408E-03 1.1393E-02 -7.1697E-03 2.4109E-03 -4.7420E-04 5.4814E-05 -3.3917E-06 8.4712E-08
S12 -2.5886E-01 1.6233E-01 -7.8487E-02 2.6930E-02 -6.5812E-03 1.1145E-03 -1.2203E-04 7.6548E-06 -2.0738E-07
S13 -1.4069E-01 8.3079E-02 -4.9557E-02 1.5761E-02 -2.6771E-03 2.3664E-04 -8.3436E-06 -1.3184E-07 1.2387E-08
S14 1.2617E-01 -7.2883E-02 1.1863E-02 1.4019E-03 -8.1117E-04 1.3159E-04 -1.0914E-05 4.7242E-07 -8.4921E-09
S15 -3.5150E-02 -2.2400E-04 6.3117E-03 -1.7891E-03 2.3250E-04 -1.6487E-05 6.3596E-07 -1.1531E-08 5.4203E-11
S16 -5.1641E-02 1.0035E-02 1.4959E-04 -4.7720E-04 9.9569E-05 -1.0232E-05 5.8441E-07 -1.7733E-08 2.2312E-10
Watch 10
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens according to embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural view of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens, in order from an object side to an image side along an optical axis, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, a filter E9, and an image forming surface S19.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a convex object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. The sixth lens element E6 has negative power, and has a convex object-side surface S11 and a concave image-side surface S12. The seventh lens element E7 has positive power, and has a convex object-side surface S13 and a convex image-side surface S14. The eighth lens element E8 has negative power, and has a concave object-side surface S15 and a concave image-side surface S16. Filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the respective surfaces S1 to S18 and is finally imaged on the imaging surface S19.
In the present embodiment, the total effective focal length f of the optical imaging lens is 5.33mm, and the maximum field angle FOV of the optical imaging lens is 79.0 °.
Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of the radius of curvature, the thickness/distance, and the focal length are all millimeters (mm).
Figure BDA0003364688780000141
Figure BDA0003364688780000151
TABLE 11
In embodiment 6, both the object-side surface and the image-side surface of any one of the first lens E1 through the eighth lens E8 are aspheric. Table 12 below shows the high-order coefficient A of each of the aspherical mirror surfaces S1-S16 used in example 64、A6、A8、A10、A12、A14、A16、A18And A20。
Flour mark A4 A6 A8 A10 A12 A14 A16 A18 A20
S1 4.6578E-03 1.8577E-04 -1.3298E-03 1.3463E-03 -5.8185E-04 1.3191E-04 -1.5878E-05 1.5294E-06 -1.7363E-07
S2 2.8802E-02 -1.8963E-02 1.1675E-02 -5.2098E-03 1.4959E-03 -2.4364E-04 1.6427E-05 0.0000E+00 0.0000E+00
S3 -6.5660E-02 3.2759E-02 -3.5601E-02 3.0733E-02 -1.8313E-02 6.7579E-03 -1.3884E-03 1.2145E-04 0.0000E+00
S4 -1.0901E-01 5.7811E-02 -5.8732E-02 4.4648E-02 -2.4785E-02 8.6897E-03 -1.8128E-03 2.0945E-04 -1.5557E-05
S5 -1.7584E-02 1.0971E-02 -3.3281E-02 5.2362E-02 -5.4936E-02 3.6309E-02 -1.4654E-02 3.2953E-03 -3.1661E-04
S6 -7.8055E-02 2.3119E-02 -5.1378E-02 8.0154E-02 -7.2305E-02 3.9657E-02 -1.3070E-02 2.3741E-03 -1.8214E-04
S7 -7.7149E-02 2.6830E-02 -9.0401E-02 1.3680E-01 -1.1746E-01 6.2138E-02 -1.9878E-02 3.4947E-03 -2.5683E-04
S8 -1.0840E-02 -6.6365E-03 -3.0636E-02 3.9580E-02 -2.3164E-02 7.2702E-03 -1.1800E-03 7.5296E-05 6.4218E-07
S9 2.5560E-01 -2.4926E-01 1.6906E-01 -6.3499E-02 8.1345E-03 2.8388E-03 -1.3275E-03 2.0679E-04 -1.1813E-05
S10 2.0530E-01 -2.0253E-01 1.4284E-01 -6.6188E-02 2.0002E-02 -3.7834E-03 4.1031E-04 -2.0038E-05 8.5086E-08
S11 -4.3110E-02 4.7947E-02 -3.9897E-02 1.9911E-02 -6.8324E-03 1.5940E-03 -2.3869E-04 2.0570E-05 -7.6956E-07
S12 -3.1949E-01 2.6210E-01 -1.5740E-01 6.3215E-02 -1.7016E-02 3.0157E-03 -3.3446E-04 2.0899E-05 -5.5978E-07
S13 -1.4147E-01 1.0968E-01 -8.2549E-02 3.3244E-02 -7.8003E-03 1.1204E-03 -9.7298E-05 4.6941E-06 -9.6625E-08
S14 1.7795E-01 -1.2372E-01 3.4203E-02 -4.4872E-03 2.3789E-04 -7.2682E-07 4.4279E-07 -1.0871E-07 4.5691E-09
S15 -1.4613E-02 -4.0791E-02 2.6169E-02 -6.7793E-03 9.7613E-04 -8.5154E-05 4.5132E-06 -1.3454E-07 1.7338E-09
S16 -4.8157E-02 -9.9788E-03 1.0362E-02 -3.1064E-03 5.0181E-04 -4.8261E-05 2.7613E-06 -8.6827E-08 1.1554E-09
TABLE 12
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing meridional field curvature and sagittal field curvature of the optical imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a chromatic aberration of magnification curve of the optical imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens according to embodiment 6 can achieve good imaging quality.
In summary, examples 1 to 6 each satisfy the relationship shown in table 13.
Conditions/examples 1 2 3 4 5 6
f/R13 2.90 2.97 3.30 3.24 3.29 3.24
T23/CT2 3.19 3.11 2.78 2.96 3.08 2.98
T45/CT5 2.12 2.18 1.93 1.74 1.87 1.82
f/f7 1.88 1.89 1.74 1.77 1.82 1.77
f5/f6 0.86 1.01 1.83 1.73 1.32 1.63
f/R3+f/R4 5.72 5.61 5.68 5.68 5.63 5.65
f/R9+f/R10 -8.86 -8.87 -8.69 -8.59 -8.75 -8.66
f/f1 0.93 1.02 0.97 0.99 0.98 0.99
f/f34 0.48 0.48 0.55 0.56 0.52 0.55
f/f67 1.41 1.40 1.06 1.09 1.24 1.11
f2/f8 2.84 2.48 2.17 2.25 2.37 2.21
R1/R2 -0.02 -0.11 -0.04 -0.06 -0.08 -0.07
(CT3+CT4)/(CT6+CT7) 1.04 1.07 1.01 1.05 1.14 1.07
T78/CT8 1.62 1.36 1.62 1.55 1.47 1.51
TTL/EPD 1.95 1.94 1.89 1.91 1.95 1.92
f×TAN(FOV/2)(mm) 4.39 4.40 4.39 4.39 4.39 4.39
f/EPD 1.40 1.40 1.40 1.40 1.40 1.40
V7-V6 10.33 12.83 0.00 11.94 11.00 11.42
Watch 13
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. An optical imaging lens, in order from an object side to an image side along an optical axis, comprising:
a first lens having a positive optical power;
a second lens having a focal power, wherein the object-side surface of the second lens is convex, and the image-side surface of the second lens is concave;
a third lens having optical power;
a fourth lens having an optical power;
a fifth lens element with a focal power, wherein the object-side surface of the fifth lens element is concave and the image-side surface of the fifth lens element is convex;
a sixth lens having a negative optical power;
a seventh lens having positive optical power; and
an eighth lens having a negative optical power;
wherein the total effective focal length f of the optical imaging lens and the maximum field angle FOV of the optical imaging lens satisfy:
f×TAN(FOV/2)>4.0mm。
2. the optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the radius of curvature R13 of the object side surface of the seventh lens satisfy:
f/R13>2.5。
3. the optical imaging lens of claim 1, wherein the second lens and the third lens are separated by a distance T23 on the optical axis and a center thickness CT2 of the second lens on the optical axis, which satisfy:
2.0<T23/CT2<3.5。
4. the optical imaging lens of claim 1, wherein the separation distance T45 on the optical axis of the fourth lens and the fifth lens and the center thickness CT5 on the optical axis of the fifth lens satisfy:
1.5<T45/CT5<2.5。
5. the optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the effective focal length f7 of the seventh lens satisfy:
1.5<f/f7<2.0。
6. the optical imaging lens of claim 1, wherein the effective focal length f5 of the fifth lens and the effective focal length f6 of the sixth lens satisfy:
0.8≤f5/f6<2.0。
7. the optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens, the radius of curvature R3 of the object-side surface of the second lens, and the radius of curvature R4 of the image-side surface of the second lens satisfy:
f/R3+f/R4>4.5。
8. the optical imaging lens of claim 1, wherein a total effective focal length f of the optical imaging lens, a radius of curvature R9 of an object-side surface of the fifth lens, and a radius of curvature R10 of an image-side surface of the fifth lens satisfy:
f/R9+f/R10<-7.0。
9. the optical imaging lens of claim 1, wherein the total effective focal length f of the optical imaging lens and the effective focal length f1 of the first lens satisfy:
0.9≤f/f1≤1.1。
10. the optical imaging lens of claim 1, wherein a total effective focal length f of the optical imaging lens and a combined focal length f67 of the sixth lens and the seventh lens satisfy:
1.0≤f/f67<1.5。
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